But this unification of the social life, by the working of the capitalist form of production, developed itself from the beginning, and continues to develop itself, not according to preconceived rules, plans and designs, but, on the contrary, by reason of frictions and struggles, which in their sum form a colossal complication of antitheses. War without and war within. Struggle incessant among the nations, and struggles incessant between the members of each nation. And the interlacings of the deeds and the action of so many emulators, competitors and adversaries is so complicated, that the co-ordination of events very often escapes the attention, and it is a very difficult thing to discover their intimate connection. The struggle which actually exists among men, the struggles which now, with various methods, are unfolding among nations and within nations, have come to make us understand better in the midst of what difficulties the history of the past has unfolded. If the bourgeois ideology, reflecting the tendency to capitalist unification, has proclaimed the progress of the human race, historical materialism, on the contrary, and without proclamation, has discovered that these are the antitheses which have thus far been the cause and the motive of all historical events. Thus the movement of history, taken in general, appears to us as it were oscillating;--or rather, to use a more appropriate image, it seems that it is unfolding on a line often interrupted, and at certain moments it seems to return upon itself, sometimes it stretches out, removing itself far from the point of departure:--in an actual zigzag. Granted the internal complication of every society, and granted the meeting of several societies on the field of competition (from the ingenuous forms of robbery, rapine and piracy to the refined methods of the elegant sport of the stock exchange) it is natural that every historical result, when it is measured in the one measure of individual expectation, appears very often like chance, and afterwards, considered theoretically, becomes for the mind more inextricable than the track of meteors. Speaking of the irony which sits as a sovereign above history is not a simple phrase; because, in truth, if there is no god of Epicurus laughing above over human affairs, here below human affairs are of themselves playing a divine comedy.